桩-土非线性动力相互作用简化模型  

Simplified model of nonlinear pile-soil dynamic interaction

作　　者：李正农[1] 周振纲[1] 朱旭鹏[1] 

机构地区：[1]湖南大学建筑安全与节能教育部重点实验室,湖南长沙410082

出　　处：《自然灾害学报》2013年第6期252-260,共9页Journal of Natural Disasters

基　　金：国家"十一五"科技支撑计划项目(2006BAB04A05)

摘　　要：结合EL Naggar和Nogami的研究成果,建立了一种桩土侧向非线性动力相互作用计算的简化模型,给出了相应模型参数的确定方法,并依据渡槽原理性拟动力试验结果,对其适用性进行了分析。结果表明,根据简化模型建立的渡槽拟动力试验模型有限元模型计算得到的墩身位移及槽体位移的最大值和位移时程与试验结果吻合较好,说明所建立的桩土动力非线性简化模型基本上能反映试验桩土的相互作用情况,能满足工程精度要求。另外,该模型具有计算效率高且非线性分析易于收敛等特点,是土-桩-结构水平动力非线性响应近似估计的一种有效方法。Based on the research results of EL Naggar and Nogami, a simplified model was developed to resolve the problem of pile-soil lateral nonlinear dynamic interaction. Meanwhile, a method to determine the model parameters was given and the applicability of the model was examined according to the results of the pseudo-dynamic test of the aqueduct. Results show that the maximum displacement value and the displacement time-histories of pier and aqueduct body obtained by FEM calculation of simplified model were in good agreement with the experimental data. The fact demonstrates that, the model could approximately reflect the interaction of soil-pile-structure of the test and meet the needs of the engineering veracity. In addition, the model has the advantages of high computational efficiency and quick convergence, and thus is effective for the approximate estimation of the lateral dynamic response of soil-pile-structure systems.

关 键 词：桩 非线性 动力相互作用 简化模型 拟动力试验 

分 类 号：TV312[水利工程—水工结构工程] TV321